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Post by beachball on Aug 30, 2011 14:31:35 GMT
I was just wondering how much it costs on average to raise say a Barbel from egg to release weight, including transport food and man hours thanks best regards Malc.
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Post by Sam Vimes on Aug 30, 2011 18:05:52 GMT
Malc, sounds like a question for the next EA fisheries QA. EA Calverton is supposed to be the biggest breeder of barbel in the country.
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Post by beachball on Aug 30, 2011 19:14:39 GMT
Malc, sounds like a question for the next EA fisheries QA. EA Calverton is supposed to be the biggest breeder of barbel in the country. Lol Sam thats why i've put it in the section for the Q&A section for session No3 regards Malc. ;D
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Post by Sam Vimes on Aug 30, 2011 19:22:40 GMT
Lol Sam thats why i've put it in the section for the Q&A section for session No3 regards Malc. ;D That'll teach me to click on the new posts link and not take any notice of which section a post is in!
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Post by beachball on Aug 30, 2011 19:39:13 GMT
Lol Sam thats why i've put it in the section for the Q&A section for session No3 regards Malc. ;D That'll teach me to click on the new posts link and not take any notice of which section a post is in! Malc.
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Post by envagencyyorkshire on Sept 8, 2011 12:09:38 GMT
It is impossible to separate out the exact cost of production for individual species but the average cost for an 18 month old fish including spawning, food, man hours, transport etc is between £0.80 and £0.95 per fish.
The Environment Agency’s National Coarse Fish Rearing Unit is situated at Calverton, a few miles North of Nottingham. All of the fish produced at the site are used by the Environment Agency to replace stocks lost during fish kills, improving existing stocks and in the development of new fisheries.
Species grown at Calverton are chub, dace, roach, bream, barbel, tench, crucian carp, rudd and grayling and each year more than half a million fish are released into rivers and lakes throughout the length and breadth of England and Wales.
The Calverton site covers 17 acres and has 32 aerated mature ponds ranging in size from 300m2 to 5000m2 some of which are covered with large poly tunnels. These structures increase the water temperatures by up to 8oC and the fish grow very quickly in the warm, clean, food rich water.
The site also has a research unit and a warm water hatchery that is used to produce eggs and larvae in the spring and early summer.
The eggs are obtained from selected adult fish, taken from carefully chosen rivers when they are ready to breed. These brood fish are taken back to Calverton and encouraged to spawn using natural hormones. The “ripe” adults are anaesthetised and gently squeezed to remove the eggs and sperm.
When the eggs hatch and the tiny larvae begin to swim, specially prepared fry ponds are stocked with as many as 35,000 individuals. The water in the ponds is warmed by the sun and the fry grow very quickly.
Calverton aims to rear fish to as large a size as possible in approximately 18 months before they are stocked into rivers and lakes. The fish range in size between 10 and 15cms depending on the species and studies have shown that fish of this size range have a good chance of survival in the wild.
The fish are delivered to their new homes using a purpose built 6x6 vehicle mounted with 300 litre oxygenated tanks that allow the fish to be released with the minimum of netting and handling.
All the work at Calverton is funded by anglers purchasing fishing licences so, as well as contributing to the environmental benefits, anglers buying a rod licence are improving the sport for future generations.
Alan Henshaw – Team Leader, Calverton Fish Farm
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Post by envagencyyorkshire on Sept 8, 2011 13:05:27 GMT
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